TWO NEW SPECIES OF HERPOSIPHONIA (RHODOPHYTA) FROM THE COAST OF FUJIAN, CHINA
Zheng Yi and Chen Zhuohua(Department of Biology, Fujian Teachers University, Fuzhou 350007)
In the paper, two new species of Herposiphonia, namely, Herposiphonia fujianensis sp. nov. and H. basilaris sp. nov. collected in 1983-1986 from the coast of Fujian are reported. The establishments of them are based on the number of segments in determinate branches and the position of cystocarps. The Holotype materials are deposited in the Herbarium of Department of Biology, Fujian Teachers University.1. Herposiphonia fujianensis sp. nov.(Fig. 1; P1. I: 1)Epiphytic algae, with indeterminate prostrate branches 60-90μm in diam., 9(8) pericen-tral cells, mostly with no bare nodes; determinate branches 45-70 μm in diam., composed of 20-37 segments, with 8(9) pericentral cells; chromatophores not zonate; trichoblasts usually lacking; tetrasporangia in straight of 8-16 in the determinate branches; procarps arising on the 4(3) segment from the base to the apex of the determinate branches; cystocarps in similar positions, ovate; spermatangial stichidia not observed.Holotype: F. T. U. 83-39((?),(?)) growing on the other algae in the lower littoral zones, Gul angyu, Xiamen, Fujian Province, on Dec. 9, 1983.The new species is characterized by the varying position of the cystocarps which arise from the base to the apex of the determinate branches. It differs from other species of Herposiphonia reported.2. Herposiphonia basilaris sp. nov. (Fig. 2; P1. Ⅰ: 2; PL Ⅱ)Epiphyic algae, with indeterminate branches 70-110-(130) μm in diam., 8 or, 9 pericentral cells, with no bare nodes; determinate branches 40-65-(75) μm in diam. composed of 5-12-(14) segments, with 8(9) pericentral cells; trichoblasts 2-4, terminal, with 2-3 dichotomies, mostly deciduous; tetrasporangia in straight of 2-5 in the middle or lower part; cystocarps ovate to urceolate, arising on the 2nd or 3rd segment from the bases of the determinate branches; spermatangial stichidia 1 or 2, lanceolate, in the 2nd to 4th segment from the base of the determinate branches.Holotype: F. T. U. 84-77((?),(?),(?)) growing on the other algae in the lower littoral zones, Yongning, Jinjiang county, Fujian Province, on Sept 23, 1984.This species is closest to H. parca as described by Hollenberg, but differs in the position of cystocarps which arise in the basilar segments of the determinate branches rather than in the terminal segments as in H. parca. In the arising position of procarps this species is similar to H. delicatula Hollenberg, from which it differs in the fewer number of segments and the lower position of procarps in the determinate branches.Comparison of two new species with approximate species is seen in Tab. 1.